Application of low-dose contrast agent in 3D dynamic contrast enhanced MR angiography of lower extremity arterial disease
10.7687/j.issn1003-8868.2017.04.074
- VernacularTitle:低剂量对比剂在下肢动脉疾病3D CE-MRA中的应用
- Author:
Ling ZHANG
;
Dapeng LI
- Keywords:
magnetic resonance angiography;
low dose;
contrast agent;
low extremity;
artery
- From:
Chinese Medical Equipment Journal
2017;38(4):74-77
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore a safe and effective imaging method by the application of 3D contrast-enhanced MR Angiography (3D CE-MRA) with low-or conventional-dose contrast agent to the examination of lower extremity arterial disease.Methods Totally 31 patients suspected with lower extremity arterial stenosis or occlusion underwent 3D CE-MRA examination including one patient had right leg cut due to the disease,of whom,18 ones had conventional-dose contrast agent (38 ml) injected in 1.5T MR machine and 13 ones had low-dose agent (15 ml) injected in 3.0T MR machine.Quality evaluation was carried out for the images by different doses of agents.Results All the patients had no agent allergy occurred,and one patient had left tibia-fibula motion artifact due to involuntary movement.3.0T MR machine with low-dose agent behaved better than 1.ST MR machine with conventional-dose agent in leg imaging,while there were no significant differences between the quality of the images except that of popliteal artery (P>0.05).Conclusion 3D CE-MRA is an effective and safe method in detecting lower extremity artery disease,and 3.0T MR machine with low-dose agent lays a foundation for clinical diagnosis and treatment.